Complications
Although strep throat isn't dangerous, it can lead to serious complications. Antibiotic treatment reduces the risk.
Spread of infection
Strep bacteria may spread, causing infection in:
- Tonsils
- Sinuses
- Skin
- Blood
- Middle ear
Inflammatory reactions
Strep infection may lead to inflammatory illnesses, including:
- Scarlet fever, a streptococcal infection characterized by a prominent rash
- Inflammation of the kidney (poststreptococcal glomerulonephritis)
- Rheumatic fever, a serious inflammatory condition that can affect the heart, joints, nervous system and skin
Researchers are investigating a possible link between strep infection and a rare condition called pediatric autoimmune neuropsychiatric disorder associated with group A streptococci (PANDAS). PANDAS is a term used to describe certain children whose symptoms of neuropsychiatric conditions, such as obsessive-compulsive disorder or tic disorders, are worsened by strep infection.
Source: http://www.mayoclinic.com